4. [-I1 Points] DETAILS HRW1O 24.P.064. An empty hollow metal sphere has a potential of +320 V with respect to ground (dened to be at V = O) and has a charge of 4.8 X 109 E. Find the electric potential at the center of the sphere. V 5. [-I3 Paints] DETAILS HRW10 15.P.DO1. The two metal objects in the figure have net charges of +68 DC and ea pc, which result in a 30 v potential difference between them. (a) what is the capacitance of the system? pF (b) If the charges are changed to +218 pC and 7218 pC, what does the capacitance become? pF (c) What does the potential difference become? V 5. [-I1 Points] DETAILS OSUNIPHVS1 25.1.P.019. What charge (in mC) is stored in a 250 \"F capacitor when 140 V is applied to it? mC Additional Materials El Reading 7. [-I1 Points] DETAILS OSUNIPHVS1 25.1.P.025. The plates of an empty paral|e|plate capacitor of capacitance 8.0 pF are 45 mm apart. What is the area of each plate (in m2)? l,"Z Additional Materials L] Reading